Side Effects

Abbey rolled over onto her back, and as suddenly as his arousal had come, it went. Gregg beheld with a clear mind what situation he was in.

Oh shit, he thought. This was not good. Here he was with his sister sound asleep on his lap, her shirt hiked up, her bra half off, and his hands all over her. Was she asleep? He paused and listened to her breathing. Still slow, still steady. Good. He didn't know what had come over himself, but he had just felt up his sister, and that was all kinds of immoral. If she ever found out, she would kill him. At best. But look at those lips, the O they made as her jaw fell open in her slumber. How could he not just release his cock, slide between those two soft lips and thrust deep into her throat as her tongue lapped at the underside and wrapped around the engorged shaft, teasing the head until he shot his load down her throa...

Stop, he thought, just stop.

Carefully, gripping her clothing with just his fingertips, afraid that any more contact might give him away, he returned the bra strap to her shoulder, and tugged the t-shirt back down so that the edge lay across her stomach.

Lifting the pillow slightly, wary of making any movements large or sudden enough to wake her, Gregg slipped out from under Abbey's head and stood up. He turned to climb the stairs to his bed, checking his pockets for his cell and it's guiding glow. Coming up empty, he sighed and turned back to the couch, and, spying it resting towards the center where it had slipped from his pocket, bent over Abbey's prone body. His hand brushed her bottom as it sought, and then returned with, its prize.

And as Gregg turned to leave, the phone illuminating his path, he heard a voice, made sultry by sleep and with a twinge of humor, remark, "I knew you loved my ass."

Dammit.

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Gregg slept uneasily that night, alternately pondering whether he had truly gotten away with his earlier indiscretions, how disgusting what he had done was, and an endless stream of images of him fucking Abbey anywhere and everywhere. You are so sick. Abbey bent over the arm of the couch, her pert ass in the air and his cock buried to in her sopping cunt, biting a pillow and clenching her fists as an orgasm shook her. You molested your sister. Abbey's head bobbing between his legs, strands of her hair tickling his thighs as he gripped her pony tail and pushed into her hot mouth. She'll hate you.

Abbey laying back on his bed, breasts pointing to the sky, his head between her legs sucking the engorged folds of her pussy into his mouth and nuzzling her clit, drinking her sweet juices.

This is wrong.

The next morning began as the others before it, though Gregg was tired, and his body seemed to buzz with erotic energy. Wake up. Shower. Shave. Dress. Go down to the kitchen, and take his pills.

Gregg sat, and waited for the door to open.

Bang. "Hey, bro!"

"Hey Abbey."

Abbey walked past him as he sat in his chair, burning a hole in the opposite wall with his eyes in an effort not to look at her. She passed by, opened the cabinet, and reached up for a bowl to hold her cereal, her plain black exercise shorts pulling up into the crack of her ass, and her plain yellow shirt lifting up to reveal the small of her back. The V of sweat that soaked her shoulders seemed to guide his eyes down, and revealed the clasp of her bra through the slightly translucent fabric. The smell of her sweat wafted to him.

The next thing he knew, he was across the kitchen, arms wrapped around her waist, and his cock pushed tight between the cheeks of her ass, as he nuzzled her neck and tickled it with his hot breath.

"Little bit too close of a hug for this early in the morning, bro," she laughed as she twisted in his arms, "How about some spa..." The unfinished words hung in the air as she met his eyes and saw the look of primal hunger within. A look of fear and concern spread over her face. "Bro? Are you alri..." Her words were cut off as abruptly as those that came before, as he grabbed her face with his hand, tipping it up and covering her lips with his. He was in another world. He vaguely felt her pushing frantically at his chest with her hands, trying to shove him away, but he did not comprehend and his lips did not break from hers. Her hands gradually grew still, and dragged down his chest, the nails raking over his nipples as they passed, causing his cock to twitch and grow even harder, and a groan vibrated through his mouth. He pushed Abbey's body hard against the edge of the counter, and ground his throbbing dick against her pussy, separated only by the thin fabric of her shorts.

He felt her mouth open, whether due to lack of breath or abundance of pleasure he did not know, but he slipped his tongue between her lips. He probed her mouth, and after a slight delay felt her do the same. Their tongues danced. He felt her press to him, and, feeling her nipples stabbing at his chest, knew he had to taste them.

He pulled away from the kiss abruptly and took a step back, reaching down to grip the hem of her shirt with both hands. Abbey, regaining some of her senses, once again protested, trying to push his arms away. She was strong and normally would have been able to control Gregg with ease, but in the grip of his overwhelming fervor, he was stronger.

"We shouldn't have done that, please, stop it, stommmph!" In one quick motion, Gregg yanked the shirt upwards, turning it inside out, tangling Abbey's arms in the fabric and muffling her words as it pulled over her head. Grabbing the straps of her bra and ripping down, they broke, and he vaguely processed Abbey's shriek as the elastic snapped against her skin. Her breasts bounced free, and the bra came to rest, still hooked, at her waist.

Grasping Abbey by her thighs, weathering kicks that he was unable to feel, he lifted her up so she sat on the counter, bringing her breasts to face level. He wrapped an arm around her back, pulling her chest forward, and devoured her tit.

He was eager, and sucked the entire areola into his mouth, running his tongue around the nipple, tasting her salty skin. Burying his nose in her breast, it filled with her musk and the smell of the flowers she must have passed on her morning run. Every sense was heightened, and he was drowning in the over-stimulation. Despite her protests, he had felt her kiss him back earlier, felt her thrust back against his cock, rocking her hips against him. He had smelled the scent of her seeping pussy, unmistakable, and had seen the beginnings of a wet spot on her shorts, a darker black against black. His whole body pulsed with pleasure at the knowledge of her arousal.

Gregg let the breast slip from his mouth, dragging his teeth over the smooth flesh, and pinching the point as it went. With no delay, he sucked the nub back between his lips, holding it between his teeth and lashing at it with his tongue. Alternating between broad laps and circling the tip, biting and raking it with his teeth.

Abbey, having freed herself from the confines of her t-shirt, returned her hands to his body, but did not push him away. Instead, she wrapped around his head and shoulders, locking him to her teat. Sensing his restraint was no longer needed, Gregg's arm released its grip, dragging across her back and feeling her shiver as it crossed her spine, before stroking across her side to reach her other breast, cupping it in his hand and twisting the nipple between his fingers. Abbey let out a growl and her head fell back, revealing her throat.

Gregg released his mouth's grip on Abbey's nipple, resting his forehead against her chest and breathing hard. A thin strand of saliva connected her abused tit to his slightly agape lips. Blood thundered through his head making it impossible to think clearly. He wanted to fuck her. He needed to fuck her. And he was going to.

Releasing her other breast, Gregg firmly gripped Abbey's side's above her hips and began to slowly kneel, kissing and licking down her stomach as he went, tasting every inch of her skin. He reached belly button, pausing to gently probe the indentation, feeling Abbey thrust out her stomach towards his attentions, before continuing downward, unhooking and tossing the ruined bra to the ground. Reaching the waist of her exercise shorts, he lightly kissed the skin above before sucking it against his teeth. Briefly tipping his head to drive his nose against the soaking crotch, he nuzzled it and was rewarded with another illicit groan. Slipping his fingers under the waistband, he gripped the edges of her shorts, and stood back.

Gregg yanked down, pulling her shorts down to her ankles where they hung over her sneakers. She wore no underwear. As she had previously explained, it was more comfortable for her to go without on her runs. Sensing what was coming, Abbey pressed her legs together tightly. Gregg knelt down, grasping her legs from underneath and beginning to pry them apart, giving him a space to stand. Abbey began to beg.

"Please don't, Gregg."

Having pulled her legs apart, Gregg stood, her ankles held together behind him by her crumpled shorts. He unzipped his jeans, and drew out his hard, drooling cock. "Oh please, oh please, don't do this to meoooooh God." He buried his dick in her hot cunt, and felt her walls spasm around him, pulling him in. "Oh God, oh God."

Pulling back nearly his full length, he thrust upward, and he felt her muscular thighs grip him tight, as her arms wrapped around his back and her chin came to rest on his shoulder. He once again pulled back and lunged forward. A metallic taste filled his mouth, and realized he was biting her shoulder.

He felt the pressure as she ground her clit into his pubic bone, and dampness as a drop of her juices ran down his leg. His mouth released her shoulder and locked with hers, one arm reaching around to grasp her by her hair, and another moving down to grip her by the buttocks. And slowly, he began to thrust.

He started slow, agonizingly slow, and felt his sister moan into his mouth, as he moved in and out. Their mouths separated with a wet smack. He pulled her head back by the hair, and laid a series of kisses across her throat. Gripping her ass in a vice-like grip, her pulled her to him. No more protests slipped from her mouth; her eyes became glassy, and her luscious lips parted in a slight O as her breath came in spasms. He dropped his head to a nipple, sucking it in and biting down, and began to move faster.

She began to twitch, little ripples running up her body, and her breath came in ragged gasps. As his balls tightened, he felt the first waves of her orgasm run over his cock in a heavenly massage, and her legs pulled him tight, her heels burying themselves in the small of his back. Her back arched under her own volition, thrusting her tit into his eager tongue.

"I'm gonna cum, oh please fuck me, please, please oh god, ohhhhhh fuck."

Gregg's dick was drawn deep within her, and her muscles undulated over him, the combination of the excruciating pressure and her cries pushing him over the edge. He shook, feeling his dick pulse as his cum shot deep inside of her.

His orgasm only seemed to intensify hers. As his dick pulsated within her, and he groaned into her breast, a second wave of spasms shot through her. There were no words this time. Her eyes rolled back into her head, and her body threatened to topple over, as the contractions moved upwards. Gregg gripped her back and pulled her tight, feeling her muscles squeeze and release as the aftershocks passed between them, each one's shudders setting off more in the other. He slipped out of her as his dick began to grow soft, and they rested against one another, Gregg's head on Abbey's chest, and her chin on his shoulder, as they attempted to regain their breath.

Having finally gained release, Gregg was overcome with a moment of clarity.

Oh my god, I just raped my sister. He felt sick, like a hard lump had formed in his throat and his stomach twisted into a knot. Gravity seemed to be pulling at him wrong. Oh god, what's happening to me?

He had been fine two days ago, and now he had just finished fucking his sister on the counter top. What changed?

Two days ago.

He started with the new pill two days ago.

He slipped out from between her legs, lifting one to duck underneath, and backed away, bracing himself on the tabletop behind him with panic in his eyes. Despite having just came, and the utter horror he was attempting to process, he still noticed that Abbey was a sight to behold. Eyes half closed, her chin rested against her chest, and her hair hung in disarray about her as she panted through open lips. She was covered head to toe in a sheen of sweat, and has he watched, a drop fell loose from her neck, following the contours of her collarbone and dripping down the side of one breast before falling to the floor. Her whole body was flushed, a brilliant red against her pale skin, and her nipples stood still erect, worn from his affections. Her clit was plainly visible, the rosy nub extending from its hood, and a small pool of cum was forming below her inflamed pussy lips, steadily running from her still gaped hole. Her shirt lay crumpled to the side on the counter, and her exercise shorts still hung sloppily from one sneaker. The bra Gregg had destroyed in his eagerness lay several feet away on the tile floor. He watched her abs clench as a final spasm ran up her body.

Abbey breathed out in a huge sigh.

"Oh, wow."

Folding her legs to her, she slipped the shorts off over her shoes, and placed them on the counter with her shirt. Unsteadily, she slipped down from the edge, a gush of semen falling from her pussy before slowing to a steady drizzle, a thin rope of cum running from her to the floor.

Her eyes raised to meet his, a look of dead seriousness that bordered on a glare.

"We need to talk. Couch. Now."

"Um, shouldn't we clean up first? I mean, you're naked and there's..."

"You just raped me on the kitchen counter. Tuck your dick back in if you want, but by this point you've done far more than see me naked, and the house will clean later. I'll be waiting."

And with that, she walked out the door into the next room.

Gregg felt the terror rising within him, threatening to overwhelm him. He felt an urge to just sprint out the back door and never return. This was what he had feared. Was he going to jail? He deserved it. And she hated him, which was even worse. He had destroyed twenty years of friendship in ten minutes. He stood there in the kitchen, resting heavily against the stained wood of the table, and sincerely prayed that if there was a god, any god, that it would strike him down.

But nothing happened. No bolt of lightning fell from the sky, and no karmic punishment was inflicted. He took a deep breath, and slowly let it out. He was going to have to face his sister. In an ineffective attempt at decency, he tucked his semi-hard dick back into the fly of his jeans; The crotch was still stained dark with his sister's juices, but he didn't feel right going out there with his dick in full view.

He followed his sister's footsteps into the next room.

She looked up at him from where she sat on the couch, naked except for her running shoes, and her tits swayed slightly as she turned to him.

"Come here and sit down," she said, patting the cushion beside her. She kept her eyes locked on his, and waited.

Tentatively, he proceeded to the couch. What does this mean?, he thought, If she was mad, why would she tell me to sit next to her?

Her eyes stayed steady with his as he sat down, and he looked away, embarrassed. He imagined judgement in those eyes, and he couldn't stand it. And despite how he was trying to ignore it, looking at her meant he couldn't avoid taking in her body, and the combination of her smell with her fresh-fucked appearance was affecting him. His cock was swiftly rising from half-mast to fully erect.

A hand grabbed his chin, and gently but firmly turned his head back towards her, so that their eyes met.

Gregg saw her eyes staring into his, and broke down in tears.

"I'm sorry, I'm s-so sorry. My meds..."

"Yeah, I know."

Gregg's eyes opened wide with shock.

"Wait, what? You know?"

"Yeah, dumbass. Ever since you first got sick, I've been reading up on your meds, keeping track of the side effects and such. So if something happened with them, I'd know what was going on. I was trying to protect you. So I read the pill bottles. Just in case."

She paused to drag in a breath.

"So yeah, I knew the new med might have some sexual side effects. Honestly, just figured you'd be jerking off more."

She shifted her gave from one of Gregg's eyes to the other, making sure she had his full attention.

"Anyways, I figured I'd have a little fun. Crack jokes about you checking me out, maybe tease you a bit." She glanced down into her lap for a second before resuming her gaze, a wry smile beginning to crack over her face, "I never figured that you'd be ripping off my clothes and fucking me on the kitchen counter. One hell of a side effect."

Gregg once again began to apologize.

"Relax. Neither of us meant for this to happen. It was an accident, and we didn't know enough to prevent it."

Both siblings looked away from each other. There was a long pause.

Gregg cleared his throat. "Um, there's no easy way to put this, but are you..."

"Yes, I'm on the pill"

The silence resumed.

"Well then, I'd guess I'd better go and get my doctor to switch the medication."

Gregg started to stand. He was stopped by a hand gripping his shoulder in a tightening grip.

"Sit down. We're not done."

Gregg looked at his sister, confused, but complied. The hand digging into his shoulder didn't give him much choice.

"I'm still mad at you."

Gregg hit the cushions with a thump as he was forcefully pushed, landing on his back. Surprised, he reached out with his hands, attempting to grab the back of the couch and pull himself back up, only for him to feel Abbey's warm hands wrap around his wrists. He felt a weight settle on his chest as Abbey straddled him, her legs pinning his upper arms as she positioned herself and slid her weight forwards.

"Abbey, what are you..."

"Shut up."

Gregg didn't understand what was going on. He tried to sit up, wriggling and flexing his muscles to try and unseat her, but found himself unable. She had the entire weight of her body on his chest, and there was nothing he could do about it. He tried to free his wrists, and the muscles stood out on Abbey's tan arms, but did not give an inch. He might as well be trying to bend iron. When he gave up that effort, Abbey pulled his arms up above his head, transferring his wrists to one hand and pinning them against the arm of the couch. Her free hand then passed over his face back towards her body, and Gregg's eyes followed, transfixed.

Where she sat, her legs folded on his arms and her bottom resting on his upper chest, her pussy was inches from his face. It still glistened with the combined juices from their earlier encounter, and he could still see the tip of her clit poking out from her folds. Her free hand settled lightly on her toned stomach, just above the line of her shortly cut pubes, and caressed them before moving down to her swollen slit. Her hand made two broad strokes up and down, becoming coated in the remaining fluids, before settling upwards at her growing button, lazily circling and pinching the tiny nub. Her hips thrust forwards ever so slightly into her hand.

Gregg had no idea how long he lay there staring. The sight had caused the incredible hunger to return, and his thoughts were driven out by the thundering of his blood in his ears, as his cock grew ever harder.